NCL如何读取动态的变量名

zxholystar

假设varname=（“humidity”，“temperature”），我知道可以写成比如：var =data ->humidity，但是如果我写成var =data ->varname[0]就报错，请问是需要加什么符号吗？

井中月

可能是var =data ->$varname(0)$

lleoiu

http://www.ncl.ucar.edu/Document ... les.shtml#StringRef

String references
Sometimes it is impossible to know the names of the attributes and coordinates before writing a script, or these names may vary from variable to variable. To solve this problem, string variables can be used to reference attributes and coordinates by enclosing the variable reference within dollar signs '$'. The following are examples of this:
        dimnames = (/"frtime","lat","lon"/)
        attnames = (/"_FillValue", "long_name"/)

;
; access to attribute
;       
        att0 = temperature@$attnames(0)$

;
; Example of referencing a coordinate variable
; without knowing the dimension name
;
        if(iscoord(dimnames(0))
                coord0 = temperature&$temperature!0$
        end if